What is K sum?

K-sum problems is a type of algorithm problems I encountered when preparing for job interviews. Problem statement: Given an array of integers, return all unique combinations of k numbers such that they add up to a specific target. ( Assuming k < number of elements in the given integer array)

How do you solve subset sums?

Approach: For the recursive approach we will consider two cases.

1. Consider the last element and now the required sum = target sum – value of ‘last’ element and number of elements = total elements – 1.
2. Leave the ‘last’ element and now the required sum = target sum and number of elements = total elements – 1.

Is subset sum a problem?

Subset sum problem is to find subset of elements that are selected from a given set whose sum adds up to a given number K. We are considering the set contains non-negative values. It is assumed that the input set is unique (no duplicates are presented).

What is perfect sum?

Given an array arr[] of integers and an integer K, the task is to print all subsets of the given array with the sum equal to the given target K. If it is equal, then the set is printed. …

Can a k sum path start at any node?

A path can start from any node and end at any node and must be downward only, i.e. they need not be root node and leaf node; and negative numbers can also be there in the tree. Examples: Kindly note that this problem is significantly different from finding k-sum path from root to leaves.

How to find the subarray sum of K?

Subarray Sum Equals K. The range of numbers in the array is [-1000, 1000] and the range of the integer k is [-1e7, 1e7].

What does Axis = [ 1, 2, 3 ] mean in k.sum?

[1,2,3] means that the sum (seens as an aggregation operation) runs through the second to fourth axes of the tensor. – Learning is a mess Jan 10 at 11:13 Likewise axis=-1 in sum means that the sum runs over the last axis. – Learning is a mess Jan 10 at 11:14 Just like in numpy, you can define the axis along you want to perform a certain operation.

How to print all k sum paths in a binary tree?

Print every path in the tree with sum of the nodes in the path as k. A path can start from any node and end at any node and must be downward only, i.e. they need not be root node and leaf node; and negative numbers can also be there in the tree. Recommended: Please solve it on “ PRACTICE ” first, before moving on to the solution.